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Effects Of Carbonation On The Mineral Composition Of Cement Kiln Dust, Cecilia P. Anderson
Effects Of Carbonation On The Mineral Composition Of Cement Kiln Dust, Cecilia P. Anderson
Dissertations, Master's Theses and Master's Reports - Open
Due to their relatively high calcium oxide content, industrial mineral oxide wastes are potential candidates for mineral sequestration of carbon dioxide (CO2). Cement kiln dust (CKD), a byproduct of cement manufacturing contains 20-60% CaO making it a possible candidate for CO2 sequestration. In this study, three types of CKD are characterized, before and after carbonation, using environmental scanning electron microscopy and energy dispersive x-ray microanalysis to determine the mineralogical and morphological changes occurring due to carbonation. The reactants, products, and precipitation mechanisms were investigated to enhance understanding of the governing processes and allow better utilization of CKD …
Carbon Dioxide Sequestration In Cement Kiln Dust Through Miner Carbonation, Deborah N. Huntzinger
Carbon Dioxide Sequestration In Cement Kiln Dust Through Miner Carbonation, Deborah N. Huntzinger
Dissertations, Master's Theses and Master's Reports - Open
The feasibility of carbon sequestration in cement kiln dust (CKD) was investigated in a series of batch and column experiments conducted under ambient temperature and pressure conditions. The significance of this work is the demonstration that alkaline wastes, such as CKD, are highly reactive with carbon dioxide (CO2). In the presence of water, CKD can sequester greater than 80% of its theoretical capacity for carbon without any amendments or modifications to the waste. Other mineral carbonation technologies for carbon sequestration rely on the use of mined mineral feedstocks as the source of oxides. The mining, pre-processing and reaction …
Analyzing The Effects Of Vertical Acceleration And Deceleration In Multi-Phase, Debris-Flow Sediment-Column Experiments / By Christine Marie Williams., Christine Marie Williams
Analyzing The Effects Of Vertical Acceleration And Deceleration In Multi-Phase, Debris-Flow Sediment-Column Experiments / By Christine Marie Williams., Christine Marie Williams
Dissertations, Master's Theses and Master's Reports - Open
Water-saturated debris flows are among some of the most destructive mass movements. Their complex nature presents a challenge for quantitative description and modeling. In order to improve understanding of the dynamics of these flows, it is important to seek a simplified dynamic system underlying their behavior. Models currently in use to describe the motion of debris flows employ depth-averaged equations of motion, typically assuming negligible effects from vertical acceleration. However, in many cases debris flows experience significant vertical acceleration as they move across irregular surfaces, and it has been proposed that friction associated with vertical forces and liquefaction merit inclusion …
Exploration Of Ground Penetrating Radar And Time Domain Reflectometry Methods For The Determination Of Pavement Dielectric Constant, Baron W. Colbert
Exploration Of Ground Penetrating Radar And Time Domain Reflectometry Methods For The Determination Of Pavement Dielectric Constant, Baron W. Colbert
Dissertations, Master's Theses and Master's Reports - Open
Traditionally, densities of newly built roadways are checked by direct sampling (cores) or by nuclear density gauge measurements. For roadway engineers, density of asphalt pavement surfaces is essential to determine pavement quality. Unfortunately, field measurements of density by direct sampling or by nuclear measurement are slow processes. Therefore, I have explored the use of rapidly-deployed ground penetrating radar (GPR) as an alternative means of determining pavement quality. The dielectric constant of pavement surface may be a substructure parameter that correlates with pavement density, and can be used as a proxy when density of asphalt is not known from nuclear or …